§ 17-79. Restricted substances.

No person shall discharge or cause to be discharged the following described substances, materials, waters, or wastes if it appears likely in the opinion of the sewer authority that such wastes can harm either the sewage works, have an adverse effect on the receiving stream, or can otherwise endanger life, limb, public property, or constitute a nuisance. In forming an opinion as to the acceptability of those wastes, the authority will give consideration to such factors as the quantities of subject wastes in relation to flows and velocities in the sewers, materials of construction of the sewers, nature of the sewage treatment process, capacity of the sewage treatment plant, degree of treatability of wastes in the sewage treatment plant, and other pertinent factors. The substances prohibited are:

(1)

Any liquid or vapor having a temperature higher than sixty-five (65) degrees Celsius.

(2)

Any water or waste containing fats, wax, food related grease, or oils whether emulsified or not, in excess of one hundred (100) mg/l or containing substances which may solidify or become viscous at temperatures between zero (0) degrees and sixty-five (65) degrees Celsius.

(3)

Any residential garbage that has not been properly shredded. The installation and operation of any garbage grinder equipped with a motor of three-fourths (¾) horsepower or greater shall be subject to the review and approval of the authority. Grinding of garbage from food preparation establishments is prohibited.

(4)

Any waters or wastes containing strong acid, iron-pickling wastes, or concentrated plating solutions whether neutralized or not.

(5)

Any waters or wastes containing iron, chromium, copper, zinc, cyanides, nickel, lead, tin, silver, mercury, and similar objectionable or toxic substances; or wastes exerting an excessive chlorine requirement.

(6)

Any waters or wastes containing phenols or other taste, or odor-producing substances, in such concentrations exceeding limits which may be established by the authority as necessary, after treatment of the composite sewage, to meet the requirements of the state, federal, or other public agencies.

(7)

Any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the authority in compliance with applicable state or federal regulations.

(8)

Any waters or wastes having a pH in excess of 9.5.

(9)

Materials which exert or cause:

a.

Concentrations of inert suspended solids (such as, but not limited to, Fullers earth, lime slurries, and lime residues) or of dissolved solids (such as, but not limited to, sodium chloride, and sodium sulfate) in excess of three hundred fifty (350) mg/l.

b.

Excessive discoloration (such as, but not limited to, dye wastes and vegetable tanning solutions).

c.

A BOD or chemical oxygen demand in excess of three hundred (300) mg/l, or a chlorine requirement in excess of fifteen (15) mg/l, or in such quantities as to constitute a significant load on the sewage treatment plant.

d.

Unusual volume of flow or concentration of wastes constituting "slugs" as defined herein.

(10)

Any industrial waste having an average daily flow greater than two (2) percent of the average daily sewage flow of the City of Shelton.

(11)

Waters or waste containing substances which are not amenable to treatment or reduction by the sewage treatment processes employed, or are amenable to treatment only to such degree that the sewage treatment plant effluent cannot meet the requirements of other agencies having jurisdiction over discharge to the receiving waters.

(12)

Privy, septic tank or cesspool wastes.

(Ord. No. 80, § 3.04, 4-22-68; Ord. No. 336, 7-10-78; Ord. No. 852, § 3.04, 7-8-10)